trying to locate the former Barbara Chalfant

Back in the early 1950's I had a classmate named Barbie Chalfant.I believe her father (he might have been named Dean)worked for Prairie Farms Creamery and they lived in Standard Addition, Carlinville, IL.She would have lived on Charles Street.She had an older sister, I think her name was Caroline Chalfant.She was about two years older than Barbara.They might have had two younger sisters.Barbarba would have been born about 1946.I would like any information that might allow me to find this old friend from my childhood days.We attended North School and were in Brownie Scouts together.If anyone has information please contact me.